Giant Killer Mice of Gough Island

Remote oceanic islands often form interesting laboratories for biological process, as well as arresting geopolitical anomalies. Few are as remarkable as Gough Island, a 35 square mile landmass in the temperate reaches of the South Atlantic. Although without a self-sustaining permanent population, Gough is one of the world’s most isolated places with a continuing human presence, which usually consists of six people running a weather station. Gough itself is a dependency of Tristan da Cunha, which is a dependency of Saint Helena, which is a British overseas territory.

In regard to biology, Gough is best known for its “giant killer mice.” Inadvertently introduced house mice have evolved into a new form roughly three times the size of their progenitors. Unfortunately, these super-rodents have learned to prey on seabird nestlings. In 2005, researchers announced that mice predation risked driving several endemic bird species to extinction, including the Tristan albatross and the Atlantic petrel. In response, the British government brought in experts from New Zealand, who have considerable experience dealing with biologically threatened islands. Officials in Britain are currently considering their proposals for eliminating the killer mice.

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